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The Zoeller 510 - sentry® ii battery backup sump pump system (1320 gph @ 10') has been discontinued and is not available for purchase at this time.


Zoeller 510 - Sentry® II Battery Backup Sump Pump System (1320 GPH @ 10')

Zoeller Power Equipment and Accessories
Model: 510
(Based on expert analysis, manufacturer ratings and customer reviews)
4.0 out of 54.0 out of 54.0 out of 54.0 out of 54.0 out of 5
2 Reviews
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(as of 02:01 CST - Details)
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Back-up Sump Pumps
Switch Type
Tether Float Switch

Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."

Protect Your Basement Or Crawl Space From Flooding
Automatically starts when your existing sump pump fails

12-Volt, High Capacity Backup Sump Pump
Non-corrosive thermoplastic construction
Pumps 2040 gallons-per-hour @ 5 lift (or 1320 GPH @ 10)

Battery Charger & Control Box w/ Alarms
Self contained 10-Amp battery charger
Battery burn out and overcharge protection
LED lights for charging/battery and alarm status

Control Device
Reliable tether float switch

Battery Box
Non-corrosive polyethylene design w/ lock strap
Accommodates maximum battery size of 13 x 7 x 9
Fits all group size 27 marine batteries
System can be expanded to accommodate multiple batteries

Furnished With All Required Fittings

Includes (2) heavy duty check valves

PLEASE NOTE - Higher Volume Pump May Be Substituted

12 Volt DC
Battery Included
Housing Material
Handles Solids
Float Type
Tether Switch
GPH @ 0 feet
GPH @ 5 feet
GPH @ 10 feet
GPH @ 15 feet
Discharge Port Size
1-1/2 Inch
Built-in check Valve
Consumer Warranty
1 Year
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  5 Questions
Q: Looking down the road, if and when the pump fails / wears out, would I be able to replace it or do I need to replace the entire unit? Hence, would I be able to use the power inverter or controller with other pumps? Thanks.
by Larry from Illinois on January 22, 2014

A: These battery backup systems, like any other system are designed to work with their specific components only. If any one of them should fail, you could contact the MANUFACTURER and they would assist you in replacing the specific component.

by Jim, Product Expert

Q: I want to purchase an alarm system for my Zoeller 503-0005 water activated sump pump backup system. I believe this is called an automatic dialer that will call my cell phone if the system is activated. Do I also need to purchase the Zoeller alarm system? What are the model numbers and prices for what I need? Thank you.
by Terry Keegan from Wisconsin on April 16, 2011

A: You could go with the Protected Home model BD-5000 Basic Alarm Dialer and the Protected Home model WS-04 WaterSiren Plus. This would give you a 90 Decibel Alarm for when you are home and the added convenience of the phone dialer when your not.
One last option would be the Reliance Controls model THP201 Freeze/Flood/Power Failure PhoneAlert Monitoring System which is capable of calling up to 3 phone lines.
by Jim, Product Expert

Q: Why does the charging system stay on charge all the time and not go back and forth between charge and fully charge?
by Thomas Kirkpatrick from Michigan on January 28, 2011

A: According the the owner's manual, it should alternate between charge and fully charged. I would suggest having your battery tested to make sure that it is able to hold a full charge.

For advanced troubleshooting, Zoeller can be reached @ (800) 928-7867
by Jim, Product Expert

Q: Do I need to leave my battery backup system charging at all times?
by Patrick Mcclone from Wisconsin on January 03, 2011

A: To be completely sure your backup system is fully functional during a power outage or weather event, these systems need to stay plugged in at all times.

by Jim, Product Expert

Q: how many hours backup does this provide in case the power goes out. we are looking for a 24 hour back up pump.
by Diana from New Jersey on January 03, 2011

A: This system does not include a battery, and that is what determines the hours of backup a system can provide. There is also the factor of how often a system is running that determines the amount of backup time.

by Jim, Product Expert

Zoeller 510 Reviews & Ratings
2 Reviews  Sort by 
Phila, PA
Total Helpful Votes
12 Helpful Votes
3 out of 53 out of 53 out of 53 out of 53 out of 5
Zoeller Back Up 510 To A M98
Have had 5 M98's over the years. 4 have failed do to heavy use. But not the pump itself, the switchs have stopped working. Which brings me to the 510 backup. I have had one 510 fail because of not being used. So now I unplug the M98 and let the 510 run for 15 min so that the seals do noy dry out. Also be sure to check on the battery every 6 months.
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Washington Dc, DC
Total Helpful Votes
10 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Fantastic Because The Parts Are Replaceable
This is a fantastic pump. It is fantastic because all of the parts that will wear out in the next 5 years are replaceable.

For example, it comes with a Rule 4000 pump which can be bought for about 200 bucks and is a brilliant 12 volt pump commonly used on yachts. So when the pump goes, you just need to buy a new 12 volt Rule pump not a whole new system.

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